Devil May Cry walkthrough/SM12

To find this mission, you have to find a hidden room across from the Divinity Statue in Mission 21.

Walkthrough
Walk down the path, killing the Nobodies and collecting a Blue Orb Fragment along the way. At the end is a room with a T. Rex skeleton in it. This one doesn't spit fire like the one in Mission 17, and must be defeated with good old-fashioned elbow grease. Any Devil Arm works well, but it is impervious to gunfire. After the "dragon" is dead, two Frosts will spawn. Use Ifrit to kill them.

Once everything is dead, you must jump across the "invisible" platforms to reach the Bangle of Time. Lightning flashes will illuminate where they are.